MIL-PRF-1/889J
TABLE I. Group A inspection - Continued.
Conditions
Symbol
Limits
Unit
Inspection
Method
MIL-STD-
1311
min
max
Conformance
inspection, part 2
-continued
W
---
225
class c amplifier;
Po
2214
RF useful power
F = 470 to 500 MHz;
output
8/
Eb = 2,000 V dc; Ec1 -90 Vdc;
Ec2 = 250 to 300 Vdc;
Ic1 = 25 mAdc (max);
Eg1/Ib = 250 mAdc;
Ef = 5.5 Vac
Conformance
inspection, part 3
hrs
group C; rf useful power
---
500
---
t
Life test (1)
output
---
Life-test (1)
end points:
μA dc
-250
---
1266
Isg1
Primary grid
Ic1 = 70 mAdc; t = 120;
emission (control)
anode and screen grids
μA dc
-250
1266
---
Primary grid
Isg2
floating
emission (screen)
Ec1 = 0; Ic2 = 100 mAdc;
μA dc
150
1336
---
Heater-cathode
Ihk
t = 120; anode floating
150
---
leakage
Ihk
μA dc
Ehk = +150 Vdc;
Δik
100
2212
---
Pulse emission 6/
Ehk = -150 Vdc
mA
Eb = Ec2 = 250 Vdc;
Ec1 = -100 V dc; egk/ik = 1.5
RF useful power
a;
Ef = 6.0 V ac; prr = 11 ±1.0;
---
2214
200
output 8/
Po
W
tp = 4,500 μs (min)
class c amplifier;
F = 470 to 500 MHz;
Eb = 2,000 V dc; Ec1 -90 Vdc;
Ec2 = 250 to 300 Vdc;
Life test (2)
Ic1 = 25 mAdc (max);
---
---
500
t
Eg1/Ib = 250 mAdc;
hrs
Ef = 5.5 Vac
Life-test (2)
---
end points:
Group C; Eb = Ec1 = Ec2 = 0;
Ef = 6.6 Vac
Inter-element
---
1366
10
leakage resistance,
MegΩ
Rg1k
---
10
cold
9/
MegΩ
Rg1g2
---
10
MegΩ
Rg2k
---
10
MegΩ
Rg2p
E = 100 Vdc: g1 negative
E = 500 Vdc: g1 negative
g2 positive
g2 negative
See footnotes at end of table
3
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